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Photon Orbit Signatures in Spectra of Black Hole Accretion Disks

Authors: Daniel C. M. Palumbo, George N. Wong, Angelo Ricarte

Daniel C. M. Palumbo et al 2025 The Astrophysical Journal Letters 994 .

Provider: AAS Journals

Caption: Figure 3.

Survey of power-law index p for the direct and indirect image magnetic field incidence angles θ_B,0 = 15° and θ_B,1 = 45° as shown in Figure 2. Steeper power laws increase the relative contribution of the photon ring, leading to substructure in the spectrum of the polarization fraction.

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